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Finding the Fourth Proportional to 515.38, 710.94 and 368.09

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Solution

The fourth proportional to 515.38, 710.94 and 368.09 is: 507.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    515.38 : 710.94 = 368.09 : x
  2. Step 2: Convert to fraction form
    515.38/710.94 = 368.09/x
  3. Step 3: Cross multiply
    515.38x = 710.94 × 368.09
  4. Step 4: Simplify right side
    515.38x = 261,689.90
  5. Step 5: Solve for x
    x = 261,689.90/515.38
  6. Step 6: Final answer
    x = 507.76

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.